Results 31 to 40 of about 11,925 (196)
The Astrophysical Journal, 2022 Abstract We study the gravitational lensing influence of a massive object in a dark matter halo, using a simple model of a point mass embedded in a spherical Navarro–Frenk–White halo. Building on the analysis of critical curves and caustics presented in the first part of this work, we proceed to explore the geometry of images formed by ...
Michal Karamazov, David Heyrovský
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Mapping the 3-D Dark Matter potential with weak shear
, 2002 We investigate the practical implementation of Taylor's (2002) 3-dimensional gravitational potential reconstruction method using weak gravitational lensing, together with the requisite reconstruction of the lensing potential.
A. N. Taylor +10 more
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Can weak lensing surveys confirm BICEP2 ? [PDF]
, 2014 The detection of B-modes in the Cosmic Microwave Background (CMB) polarization by the BICEP2 experiment, if interpreted as evidence for a primordial gravitational wave background, has enormous ramifications for cosmology and physics.
Chisari, Nora Elisa +2 more
core +2 more sources
SELF-CALIBRATION OF GRAVITATIONAL SHEAR-GALAXY INTRINSIC ELLIPTICITY CORRELATION IN WEAK LENSING SURVEYS [PDF]
The Astrophysical Journal, 2010 14 pages, 4 figures. Heavily expanded version. No changes in major results and conclusions.
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The imprint of f(R) gravity on weak gravitational lensing – II. Information content in cosmic shear statistics [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 17 pages, 6 figures, 5 tables, accepted for publication in ...
Shirasaki, Masato +3 more
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Intrinsic and Extrinsic Galaxy Alignment [PDF]
, 2000 We show with analytic models that the assumption of uncorrelated intrinsic ellipticities of target sources that is usually made in searches for weak gravitational lensing due to large-scale mass inhomogeneities (``field lensing'') is unwarranted.
Blandford, Roger D. +2 more
core +4 more sources
Multipole analysis of cluster weak lensing shear in The Three Hundred project [PDF]
EPJ Web of ConferencesWeak gravitational lensing is an important tool to estimate the masses of galaxy clusters, as it allows us to directly access their projected surface mass density along the line of sight in a manner largely independent of their dynamical state. Moreover,
Payerne C. +4 more
doaj +1 more source
Large-Scale Structure with Gravitational Waves II: Shear [PDF]
, 2012 The B-(curl-)mode of the correlation of galaxy ellipticities (shear) can be used to detect a stochastic gravitational wave background, such as that predicted by inflation.
Jeong, Donghui, Schmidt, Fabian
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Various Approaches to Cosmological Gravitational Lensing in Inhomogeneous Models [PDF]
, 1999 Gravitational lensing of distant objects caused by gravitational tidal forces from inhomogeneities in the universe is weak in most cases, but it is noticed that it gives a great deal of information about the universe, especially regarding the ...
Nakamura, Takahiro T. +2 more
core +2 more sources
The Astrophysical Journal, 2023 Based on independent shear measurements using the Dark Energy Camera Legacy Survey/DR8 imaging data, we measure the weak lensing signals around isolated central galaxies (ICGs) from Sloan Digital Sky Survey/DR7 at z ∼ 0.1.
Pedro Alonso +8 more
doaj +1 more source